How did you determine the sex of your grasshopper?ġ2. Do all abdominal segments have spiracles? Are there any spiracles on the thoraic segments?ġ1. What system do spiracles open into on a grasshopper?ġ0. How does the tympanic membrane help a grasshopper?ĩ. Describe the differences between the two pairs of wings (appearance & function).Ĩ. How is the third pair of legs adapted for jumping?ħ. How are the ends of the legs adapted for holding onto plants?Ħ. List the grasshopper’s mouthparts & their functions.ĥ. What is the purpose of compound eyes? of simple eyes?Ĥ. Which region of the insect’s body is specialized for movement & explain why?ģ. Which region of the insect’s body is specialized for sensory functions? Explain your answer.Ģ. Table 1 – External Appendages of the Grasshopper (Attach ALL parts.)ġ. Spiracles (small openings on the side of somites or body segments)Īuditory Organs (two located laterally on the 1st body somite or segment)įigure 1 – Grasshopper Head (Label ALL parts.)įigure 2 – External Grasshopper anatomy (Label ALL parts.) Male have a more rounded abdomen that turns upward.
Females have a tapered abdomen that ends in a pointed egg laying tube called the ovipositor. Determine if your grasshopper is a male or female by looking at the end of the abdomen.Using a magnifying glass, locate the spiracles or tiny pores for respiration on each side of the abdominal segments.Locate the tympanic membrane or eardrum on the first abdominal segment.Raise both pairs of wings and locate the first abdominal segment.Remove a jumping leg and attach the walking leg & jumping leg to Table 1.Using forceps, remove one of the walking legs and identify these parts - the coxa connects the femur (the thickest part of the leg) to the grasshopper’s body a slender, spiny tibia connects the femur to the tarsal segments (lowest part of the leg).Wings (forewings have a leathery appearance & protect the hind wings) Legs (first 2 pairs are for walking & the last pair are for jumping) Examine the following appendages on the thorax (middle section of the grasshopper’s body):.Using forceps, remove each of the appendages from the head, and attached them to table 1.Label the mouthparts, eyes, and antenna on Figure 1.Mouth parts – Labrum (upper lip), mandibles (jaws) below the labrum, maxillae located behind the mandibles to help cut & hold food, and the lower lip or labium Ocelli (or simple eyes) – 3, small, between compound eyes Examine the head and locate the following parts:.Observe that the body of the grasshopper is divided into 3 regions - the head, the thorax, and abdomen.Obtain a preserved grasshopper & rinse off any preservative with water.Procedure (External Anatomy): Examine the entire grasshopper and identify the major subdivisions and parts of the body. Lab apron, gloves, eyeglasses, dissecting pan, dissecting kit with forceps & scalpel, t-pins, magnifying glass, preserved grasshopper, paper, pencil. Identify & label the internal & external anatomy of a grasshopper. Their chewing or sucking mouth parts are adapted for feeding on plant or animal materials. The insects are mostly terrestrial, they breathe air which enters small lateral openings on the body called spiracles and circulates in a system of ducts to all organs and tissues.
Insect legs are often adapted for digging, crawling, jumping, or swimming. Some insects may have a single pair of wings or be wingless. Insects have three body regions (head, thorax, & abdomen), 3 pairs of legs attached to the thorax, a single pair of antenna attached to the head, mouthparts adapted for chewing or sucking, and two pairs of wings. The genus Romalea is a large grasshopper common in the southeastern United States. Insects are in the class Insecta, & are the largest and most diverse group of animals on earth. Insects are arthropods with jointed appendages, segmented bodies, and an exoskeleton composed of chitin.
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